1. J. Speth and A. van der Woude, Rep. Prog. Phys. 44 (1981) 46,
2. S. Joly, D. M. Drake and L. Nilsson, Phys. Rev. C20 (1979) 2072.
3. P. Anderson, R. Zorro and I. Bergqvist, Proc. Int. Conf. Nuclear Data for Science and Technology, Antwerp, 1982, ed. by K. H. Bockhoff, D. Reidel, Dordrecht, 1983, p. 866.
4. H. R. Weller, Prof. Int. Symp. Neutron Capture Gamma-ray Spectroscopy, Grenoble, 1981, ed. by T. von Egidy et al., The Inst, of Phys. Conf. Ser. No. 62, 1982, p. 494.
5. H. R. Weiler and N. R. Roberson, Rev. Mod. Phys. 52 (1980) 699.